Silas cornell



, eNNrTED sTnTEs PATENT Enron.

sILAs CORNELL, OE ROCHESTER, NEW YORK.

MOUNTING GLoREs.

Specification of Letters Patent 1\T o. 4,098, dated July 5, 1845.

To aZZ 'whom t may concern: circle is graduated so that when its plane Be it known that I, SILAs CORNELL, of the cuts the poles of the globe the graduated city of Rochester, in the county of Monroe edge will show the latitude of planes which and State of New York, have invented a new are made to pass under it.

5 and useful improvement in the mounting The index g, is attached to the lower part 60 and fitting of artificial globes for the illusof the day circle, so as to stand out at right tration of several geographical and astroangles, having its point inclined downward nomical phenomena connected with the motoward the line of days in the calendar. tion of the earth, which is described as fol- Fig. 3 is the index with its broad end bent lows, reference being had to the annexed downward to be inserted in the opening 65 drawings of the same, making a part of this made to receive it as shown in Fig. 5. specification. Fig. 5 is a horizontal section of the lower The globe to which these improved appart of the day circle to show its attachpendages are fixed, may be of the common ment to the pillar that supports the globe;

l'construction, except that it should revolve the section being made through the dotted 70 on its axis and not have the axis to revolve line L, in Fig. 2 the letters in Fig. 2 and with it. Fig. 5 referring to the same parts, Zt, it.

The stand A, Figure l is a circular piece Fig. 5, is a part of the day circle bent into y of wood, having that part of its upper surthe form of half a cylinder where it rests face next the circumference made into three against the pillar z', hidden in Fig. 2 by the 75 annular divisions by concentric circles. The plate m, m. Zz, Z, is a clasp with an eye at Ze outer of these divisions contains an anato receive a wire shown at Ze Fig. 2 forming lemma, showing the declination of the sun a hinge for the clasp to turn on. The end Z, for every day in the year; the next division of the clasp, bent into the form of a hook,

contains a calendar, and the third contains is kept in its place by passing through a hole 80 -the signs of the zodiac; these two latter Z in the day circle, being so adjusted as to divisions being ofthe same construction as is press against the inner edge of the hole and usual on the wooden horizon of a common retain its place by its elasticity at the same globe. In the center of the stand is inserted time keeping the day circle pressed against a round iron rod B the lower part of which the pillar and half embracing it. m, m, is a 85 is called the pillar and the upper part the double plate of metal with its ends bent at axis. These may be of one or more pieces right angles and soldered to the day circle, as may be most convenient. The pillar is with an opening to receive the index. connected to the axis by an arm which is A brass meridian n, n, Fig. 2 revolves on curved, being a segment of 23 28 of a circle the extremities of the axis of the globe, being 90 whose radius is its distance from the center graduated from the Equator to the poles. of the globe, as shown more fully in Fig. 2. The pillar is so inserted in the stand that The upper part of the axis is made square to the arm connecting it with the axis extends lit the socket of the brass rest C, which supin a line toward the beginning of the sign ports the day circle on a pivot D. The rest Capricorn and the upper or north end of the 95 is shown in Fig. 4. axis is inclined toward the beginning of the The day circle is a thin circular plate of` sign Cancer. metal E, E, supported on the pivot D, and When the index is set to any day in the kept in its place at the bottom by a clasp calendar, and the globe made to revolve on securing it to the iron pillar around which its axis, it will show, on the light side of 100 it revolves. One side of this circle is supthe day circle, those parts of the earth that posed to always face the sunsl place, and is receive the light of the sun on that day; and made white to indicate day: the other side the number of meridians on that side of the is blackened to indicate night. 1 At right day circle in any latitude will show the numangles with the axis of the day circle and at ber of hours in a day in that latitude at that 105 equal distances from the points on which it time of the year; and the dark side of the turns is marked a line for the plane of the day circle will give the same particulars in ecliptic, having an illuminated point on the relation to the night. right hand to indicate that the sun is always The declination of the sun is shown for in that plane. The inner edge of the day all times of the year by the relative positions 110 of the Equator and the ecliptie; and also by ed upon the oblique axis and in combination the analemma. therewith the calendar and analemma. l0

Many other particulars to be illustrated Rochester 6th month 14 1845. by this globe cannot be here enumerated. 5 The invention claimed and desired vto beL SILAS CORNELL' secured by Letters Patent consists in Witnesses:

The arrangement of the day circle With its F. I. M. CORNELL,

index in combination With the globe mount` WILLIAM RUMBLE. f 

